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220 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <config_feature_desktop.h>
#include <sal/config.h>
#include <toolkit/helper/accessiblefactory.hxx>
#include <osl/module.h>
#include <osl/diagnose.h>
#include <osl/mutex.hxx>
#include <rtl/ref.hxx>
#include <tools/svlibrary.h>
#include <helper/accessibilityclient.hxx>
namespace toolkit
{
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::accessibility;
namespace
{
#ifndef DISABLE_DYNLOADING
static oslModule s_hAccessibleImplementationModule = nullptr;
#endif
#if HAVE_FEATURE_DESKTOP
static GetStandardAccComponentFactory s_pAccessibleFactoryFunc = nullptr;
#endif
static ::rtl::Reference< IAccessibleFactory > s_pFactory;
}
//= AccessibleDummyFactory
namespace {
class AccessibleDummyFactory:
public IAccessibleFactory
{
public:
AccessibleDummyFactory();
AccessibleDummyFactory(const AccessibleDummyFactory&) = delete;
AccessibleDummyFactory& operator=(const AccessibleDummyFactory&) = delete;
protected:
virtual ~AccessibleDummyFactory() override;
public:
// IAccessibleFactory
css::uno::Reference< css::accessibility::XAccessibleContext >
createAccessibleContext( VCLXButton* /*_pXWindow*/ ) override
{
return nullptr;
}
css::uno::Reference< css::accessibility::XAccessibleContext >
createAccessibleContext( VCLXCheckBox* /*_pXWindow*/ ) override
{
return nullptr;
}
css::uno::Reference< css::accessibility::XAccessibleContext >
createAccessibleContext( VCLXRadioButton* /*_pXWindow*/ ) override
{
return nullptr;
}
css::uno::Reference< css::accessibility::XAccessibleContext >
createAccessibleContext( VCLXListBox* /*_pXWindow*/ ) override
{
return nullptr;
}
css::uno::Reference< css::accessibility::XAccessibleContext >
createAccessibleContext( VCLXFixedHyperlink* /*_pXWindow*/ ) override
{
return nullptr;
}
css::uno::Reference< css::accessibility::XAccessibleContext >
createAccessibleContext( VCLXFixedText* /*_pXWindow*/ ) override
{
return nullptr;
}
css::uno::Reference< css::accessibility::XAccessibleContext >
createAccessibleContext( VCLXScrollBar* /*_pXWindow*/ ) override
{
return nullptr;
}
css::uno::Reference< css::accessibility::XAccessibleContext >
createAccessibleContext( VCLXEdit* /*_pXWindow*/ ) override
{
return nullptr;
}
css::uno::Reference< css::accessibility::XAccessibleContext >
createAccessibleContext( VCLXComboBox* /*_pXWindow*/ ) override
{
return nullptr;
}
css::uno::Reference< css::accessibility::XAccessibleContext >
createAccessibleContext( VCLXToolBox* /*_pXWindow*/ ) override
{
return nullptr;
}
css::uno::Reference< css::accessibility::XAccessibleContext >
createAccessibleContext( VCLXHeaderBar* /*_pXWindow*/ ) override
{
return nullptr;
}
css::uno::Reference< css::accessibility::XAccessibleContext >
createAccessibleContext( VCLXWindow* /*_pXWindow*/ ) override
{
return nullptr;
}
css::uno::Reference< css::accessibility::XAccessible >
createAccessible( Menu* /*_pMenu*/, bool /*_bIsMenuBar*/ ) override
{
return nullptr;
}
};
}
AccessibleDummyFactory::AccessibleDummyFactory()
{
}
AccessibleDummyFactory::~AccessibleDummyFactory()
{
}
//= AccessibilityClient
AccessibilityClient::AccessibilityClient()
:m_bInitialized( false )
{
}
#if HAVE_FEATURE_DESKTOP
#ifndef DISABLE_DYNLOADING
extern "C" { static void thisModule() {} }
#else
extern "C" void *getStandardAccessibleFactory();
#endif
#endif // HAVE_FEATURE_DESKTOP
void AccessibilityClient::ensureInitialized()
{
if ( m_bInitialized )
return;
::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
#if HAVE_FEATURE_DESKTOP
// load the library implementing the factory
if (!s_pFactory)<--- First condition
{
#ifndef DISABLE_DYNLOADING
const OUString sModuleName( SVLIBRARY( "acc" ) );
s_hAccessibleImplementationModule = osl_loadModuleRelative( &thisModule, sModuleName.pData, 0 );
if ( s_hAccessibleImplementationModule != nullptr )
{
const OUString sFactoryCreationFunc("getStandardAccessibleFactory");
s_pAccessibleFactoryFunc = reinterpret_cast<GetStandardAccComponentFactory>(
osl_getFunctionSymbol( s_hAccessibleImplementationModule, sFactoryCreationFunc.pData ));
}
OSL_ENSURE( s_pAccessibleFactoryFunc, "AccessibilityClient::ensureInitialized: could not load the library, or not retrieve the needed symbol!" );
#else
s_pAccessibleFactoryFunc = getStandardAccessibleFactory;
#endif // DISABLE_DYNLOADING
// get a factory instance
if ( s_pAccessibleFactoryFunc )
{
IAccessibleFactory* pFactory = static_cast< IAccessibleFactory* >( (*s_pAccessibleFactoryFunc)() );
OSL_ENSURE( pFactory, "AccessibilityClient::ensureInitialized: no factory provided by the A11Y lib!" );
if ( pFactory )
{
s_pFactory = pFactory;
pFactory->release();
}
}
}
#endif // HAVE_FEATURE_DESKTOP
if (!s_pFactory)<--- Second condition
// the attempt to load the lib, or to create the factory, failed
// -> fall back to a dummy factory
s_pFactory = new AccessibleDummyFactory;
m_bInitialized = true;
}
IAccessibleFactory& AccessibilityClient::getFactory()
{
ensureInitialized();
OSL_ENSURE( s_pFactory.is(), "AccessibilityClient::getFactory: at least a dummy factory should have been created!" );
return *s_pFactory;
}
} // namespace toolkit
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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